WO2008104190A1 - Surface à traînée réduite - Google Patents

Surface à traînée réduite Download PDF

Info

Publication number
WO2008104190A1
WO2008104190A1 PCT/EP2007/001670 EP2007001670W WO2008104190A1 WO 2008104190 A1 WO2008104190 A1 WO 2008104190A1 EP 2007001670 W EP2007001670 W EP 2007001670W WO 2008104190 A1 WO2008104190 A1 WO 2008104190A1
Authority
WO
WIPO (PCT)
Prior art keywords
longitudinal axis
groove
helical grooves
vortexes
grooves
Prior art date
Application number
PCT/EP2007/001670
Other languages
English (en)
Inventor
Jacobus Lambertus Van Merksteijn
Original Assignee
Kick Off Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kick Off Ltd. filed Critical Kick Off Ltd.
Priority to PCT/EP2007/001670 priority Critical patent/WO2008104190A1/fr
Publication of WO2008104190A1 publication Critical patent/WO2008104190A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/06—Influencing flow of fluids in pipes or conduits by influencing the boundary layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits
    • F15D1/06—Influencing flow of fluids in pipes or conduits by influencing the boundary layer
    • F15D1/065—Whereby an element is dispersed in a pipe over the whole length or whereby several elements are regularly distributed in a pipe

Definitions

  • a further reduction of the drag, which the vortexes experience, is eliminated by having the vortexes running along a wave and with such a speed that the flu ⁇ dum glides over the peaks of the waves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Golf Clubs (AREA)

Abstract

L'invention porte sur une surface sensiblement cylindrique présentant plusieurs rainures hélicoïdales parallèles à axe longitudinal commun, coïncidant sensiblement avec l'axe longitudinal de la surface cylindrique, et de section transversale circulaire. La surface de chaque rainure présente plusieurs rainures hélicoïdales parallèles à axe longitudinal commun, coïncidant sensiblement avec l'axe longitudinal de la rainure.
PCT/EP2007/001670 2007-02-27 2007-02-27 Surface à traînée réduite WO2008104190A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/001670 WO2008104190A1 (fr) 2007-02-27 2007-02-27 Surface à traînée réduite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/001670 WO2008104190A1 (fr) 2007-02-27 2007-02-27 Surface à traînée réduite

Publications (1)

Publication Number Publication Date
WO2008104190A1 true WO2008104190A1 (fr) 2008-09-04

Family

ID=38657692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/001670 WO2008104190A1 (fr) 2007-02-27 2007-02-27 Surface à traînée réduite

Country Status (1)

Country Link
WO (1) WO2008104190A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105080739A (zh) * 2014-05-08 2015-11-25 中南大学 无损涡旋挖藕喷头
JP2018162856A (ja) * 2017-03-27 2018-10-18 株式会社オンダ製作所 継手
JP2021028543A (ja) * 2020-11-30 2021-02-25 株式会社オンダ製作所 継手

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB415280A (en) * 1932-11-02 1934-08-23 Viktor Schauberger Improvements in or relating to water conduits
US3175571A (en) * 1963-07-15 1965-03-30 Willard E Bankert Hydraulic liner for conduits
US20020179166A1 (en) * 2001-06-05 2002-12-05 Houston John Graeme Flow means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB415280A (en) * 1932-11-02 1934-08-23 Viktor Schauberger Improvements in or relating to water conduits
US3175571A (en) * 1963-07-15 1965-03-30 Willard E Bankert Hydraulic liner for conduits
US20020179166A1 (en) * 2001-06-05 2002-12-05 Houston John Graeme Flow means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105080739A (zh) * 2014-05-08 2015-11-25 中南大学 无损涡旋挖藕喷头
JP2018162856A (ja) * 2017-03-27 2018-10-18 株式会社オンダ製作所 継手
JP2021028543A (ja) * 2020-11-30 2021-02-25 株式会社オンダ製作所 継手
JP7051054B2 (ja) 2020-11-30 2022-04-11 株式会社オンダ製作所 継手

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